A217556 - cp's OEIS frontend

A217556 Terms as well as ending/starting digits are of alternating parity; this is the lexicographically earliest injective sequence with this property.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	20
11	11
12	22
13	13
14	24
15	15
16	26
17	17
18	28
19	19
20	40
21	31
22	42
23	33
24	44
25	35
26	46
27	37
28	48
29	39
30	60
31	51
32	62
33	53
34	64
35	55
36	66
37	57
38	68
39	59
40	80
41	71
42	82
43	73
44	84
45	75
46	86
47	77
48	88
49	79
50	200
51	91
52	202
53	93
54	204
55	95
56	206
57	97
58	208
59	99
60	210
61	101
62	212
63	103
64	214
65	105
66	216
67	107
68	218
69	109

[1, 2, 3, 4, 5, 6, 7, 8, 9, 20, 11, 22, 13, 24, 15, 26, 17, 28, 19, 40, 31, 42, 33, 44, 35, 46, 37, 48, 39, 60, 51, 62, 53, 64, 55, 66, 57, 68, 59, 80, 71, 82, 73, 84, 75, 86, 77, 88, 79, 200, 91, 202, 93, 204, 95, 206, 97, 208, 99, 210, 101, 212, 103, 214, 105, 216, 107, 218, 109]

cp's OEIS Frontend

A217556 Terms as well as ending/starting digits are of alternating parity; this is the lexicographically earliest injective sequence with this property.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	20
11	11
12	22
13	13
14	24
15	15
16	26
17	17
18	28
19	19
20	40
21	31
22	42
23	33
24	44
25	35
26	46
27	37
28	48
29	39
30	60
31	51
32	62
33	53
34	64
35	55
36	66
37	57
38	68
39	59
40	80
41	71
42	82
43	73
44	84
45	75
46	86
47	77
48	88
49	79
50	200
51	91
52	202
53	93
54	204
55	95
56	206
57	97
58	208
59	99
60	210
61	101
62	212
63	103
64	214
65	105
66	216
67	107
68	218
69	109

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	20
11	11
12	22
13	13
14	24
15	15
16	26
17	17
18	28
19	19
20	40
21	31
22	42
23	33
24	44
25	35
26	46
27	37
28	48
29	39
30	60
31	51
32	62
33	53
34	64
35	55
36	66
37	57
38	68
39	59
40	80
41	71
42	82
43	73
44	84
45	75
46	86
47	77
48	88
49	79
50	200
51	91
52	202
53	93
54	204
55	95
56	206
57	97
58	208
59	99
60	210
61	101
62	212
63	103
64	214
65	105
66	216
67	107
68	218
69	109

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	20
11	11
12	22
13	13
14	24
15	15
16	26
17	17
18	28
19	19
20	40
21	31
22	42
23	33
24	44
25	35
26	46
27	37
28	48
29	39
30	60
31	51
32	62
33	53
34	64
35	55
36	66
37	57
38	68
39	59
40	80
41	71
42	82
43	73
44	84
45	75
46	86
47	77
48	88
49	79
50	200
51	91
52	202
53	93
54	204
55	95
56	206
57	97
58	208
59	99
60	210
61	101
62	212
63	103
64	214
65	105
66	216
67	107
68	218
69	109